Intraocular lens position stability during phacovitrectomy with air or gas tamponade

To evaluate the stability of different intraocular lens (IOL) after phacovitrectomy with air or gas tamponade.Twenty-eight patients who underwent phacovitrectomy with air or sulfur hexafluoride (SF ₆ ) gas tamponade and who underwent postoperative anterior segment optical coherence tomography assessments using CASIA2 (TOMEY, Inc., Japan), were included in the study.Patients who received any of DIB00V (Johnson & Johnson Surgical Vision, Inc., USA), XY-1 (HOYA Surgical Optics Co., Japan), or NX70 (Santen Pharmaceutical Co.) implantation were analyzed. The the anterior chamber depth (ACD) and IOL position values at each measurement time point (100%, 50%, 0%) and between IOLs were compared. The IOL displacement force (mN) was measured with verification experiment and recorded at each 0.1 mm anterior movement until the anterior displacement reached 0.5 mm. The overall age was 66 (59, 73) (median [quartiles])years. The ACD values increased progressively as the postoperative gas decreased for all IOLs. Compared to the preoperative ACD, the postoperative ACD was significantly greater at 50% and 0% gas for all IOLs (P < 0.01). Additionally, DIB00V had significantly larger ACD values compared to XY-1 at 100% gas or air (P=0.023) and NX70s at 0% gas or air (P=0.008). The IOL position shifted significantly posteriorly for both DIB00V and XY-1 as the gas or air dissappeared (P<0.05). However, for NX70s, the position significantly increased from 100% to 50% (P<0.01), with no significant difference from 50% to 0% (P=0.444). IOL-by-IOLs comparisons at each time point showed that DIB00V was significantly more posterior than XY-1 at 100% (P=0.046). In the verification experiment, DIB00V showed a greater IOL displacement force against a push from the retinal surface compared to XY-1 and NX70s.DIB00V exhibited excellent Z-axis stability in phacovitrectomy with air or gas tamponade.